Once the estimated depreciation expense for an asset is calculated: Multiple Choice It may be revised to reflect changes in the asset's estimated salvage value or useful life. The estimate itself canno: be changed; however, new information should be disclosed in financial atatement footnotes It can be changed only if U.S. tax law changes. The estimate itself cannot be changed, however, new information should be disclosed in financial statement footnotes. it can be changed only if U.S. tax law changes. Any changes are accumulated and recognized when the asset is sold. The formula to compute annual straight-line depreciation is: Multiple Choice (Cost plus salvage value) divided by the useful life in periods. (Cost minus salvage value) divided by the useful life in periods. Cost divided by useful life in units. (Cost plus salvage value) divided by the useful life in periods. (Cost minus salvage value) divided by the useful life in periods. Cost divided by useful life in units. Cost multiplied by useful life in periods. Depreciable cost divided by useful life in units